905434-97-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 905434-97-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,5,4,3 and 4 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 905434-97:
(8*9)+(7*0)+(6*5)+(5*4)+(4*3)+(3*4)+(2*9)+(1*7)=171
171 % 10 = 1
So 905434-97-1 is a valid CAS Registry Number.